libavformat/mxfenc.c

   1 /*
   2  * MXF muxer
   3  * Copyright (c) 2008 GUCAS, Zhentan Feng <spyfeng at gmail dot com>
   4  * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /*
  24  * References
  25  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
  26  * SMPTE 377M MXF File Format Specifications
  27  * SMPTE 379M MXF Generic Container
  28  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
  29  * SMPTE RP210: SMPTE Metadata Dictionary
  30  * SMPTE RP224: Registry of SMPTE Universal Labels
  31  */
  32
  33 //#define DEBUG
  34
  35 #include "libavutil/fifo.h"
  36 #include "mxf.h"
  37
  38 static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
  39 static const int PAL_samples_per_frame[]  = { 1920, 0 };
  40
  41 typedef struct {
  42     AVFifoBuffer fifo;
  43     unsigned fifo_size;           ///< current fifo size allocated
  44     uint64_t dts;                 ///< current dts
  45     int sample_size;              ///< size of one sample all channels included
  46     const int *samples_per_frame; ///< must be 0 terminated
  47     const int *samples;           ///< current samples per frame, pointer to samples_per_frame
  48 } AudioInterleaveContext;
  49
  50 typedef struct {
  51     int local_tag;
  52     UID uid;
  53 } MXFLocalTagPair;
  54
  55 typedef struct {
  56     AudioInterleaveContext aic;
  57     UID track_essence_element_key;
  58     int index;            ///< index in mxf_essence_container_uls table
  59     const UID *codec_ul;
  60     int64_t duration;
  61     int order;            ///< interleaving order if dts are equal
  62     int interlaced;       ///< wether picture is interlaced
  63 } MXFStreamContext;
  64
  65 typedef struct {
  66     UID container_ul;
  67     UID element_ul;
  68     UID codec_ul;
  69     enum CodecID id;
  70     void (*write_desc)();
  71 } MXFContainerEssenceEntry;
  72
  73 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st);
  74 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st);
  75 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st);
  76
  77 static const MXFContainerEssenceEntry mxf_essence_container_uls[] = {
  78     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 },
  79       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x15,0x01,0x05,0x00 },
  80       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x00,0x00,0x00 },
  81       CODEC_ID_MPEG2VIDEO, mxf_write_mpegvideo_desc },
  82     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },
  83       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x03,0x00 },
  84       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
  85       CODEC_ID_PCM_S16LE, mxf_write_aes3_desc },
  86     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },
  87       { 0x06,0x0E,0x2B,0x34,0x01,0x02,0x01,0x01,0x0D,0x01,0x03,0x01,0x16,0x01,0x01,0x00 },
  88       { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },
  89       CODEC_ID_PCM_S16LE, mxf_write_wav_desc },
  90     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
  91       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
  92       { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
  93       CODEC_ID_NONE, NULL },
  94 };
  95
  96 typedef struct MXFContext {
  97     int64_t footer_partition_offset;
  98     int essence_container_count;
  99     uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
 100     AVRational time_base;
 101     int header_written;
 102 } MXFContext;
 103
 104 static const uint8_t uuid_base[]            = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
 105 static const uint8_t umid_base[]            = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x01,0x0D,0x00,0x13,0x00,0x00,0x00 };
 106
 107 /**
 108  * complete key for operation pattern, partitions, and primer pack
 109  */
 110 static const uint8_t op1a_ul[]              = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
 111 static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
 112 static const uint8_t primer_pack_key[]      = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
 113
 114
 115 static const uint8_t header_open_partition_key[]   = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }; // OpenIncomplete
 116 static const uint8_t header_closed_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }; // ClosedComplete
 117
 118 /**
 119  * partial key for header metadata
 120  */
 121 static const uint8_t header_metadata_key[]  = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01 };
 122
 123 static const uint8_t multiple_desc_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x0D,0x01,0x03,0x01,0x02,0x7F,0x01,0x00 };
 124
 125 /**
 126  * SMPTE RP210 http://www.smpte-ra.org/mdd/index.html
 127  */
 128 static const MXFLocalTagPair mxf_local_tag_batch[] = {
 129     // preface set
 130     { 0x3C0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x02,0x00,0x00,0x00,0x00}}, /* Instance UID */
 131     { 0x3B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x04,0x00,0x00}}, /* Last Modified Date */
 132     { 0x3B05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x03,0x01,0x02,0x01,0x05,0x00,0x00,0x00}}, /* Version */
 133     { 0x3B06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x04,0x00,0x00}}, /* Identifications reference */
 134     { 0x3B03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x01,0x00,0x00}}, /* Content Storage reference */
 135     { 0x3B09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x03,0x00,0x00,0x00,0x00}}, /* Operational Pattern UL */
 136     { 0x3B0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x01,0x00,0x00}}, /* Essence Containers UL batch */
 137     { 0x3B0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x01,0x02,0x02,0x10,0x02,0x02,0x00,0x00}}, /* DM Schemes UL batch */
 138     // Identification
 139     { 0x3C09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x01,0x00,0x00,0x00}}, /* This Generation UID */
 140     { 0x3C01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x02,0x01,0x00,0x00}}, /* Company Name */
 141     { 0x3C02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x03,0x01,0x00,0x00}}, /* Product Name */
 142     { 0x3C04, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x05,0x01,0x00,0x00}}, /* Version String */
 143     { 0x3C05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x20,0x07,0x01,0x07,0x00,0x00,0x00}}, /* Product ID */
 144     { 0x3C06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x03,0x00,0x00}}, /* Modification Date */
 145     // Content Storage
 146     { 0x1901, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x01,0x00,0x00}}, /* Package strong reference batch */
 147     { 0x1902, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x05,0x02,0x00,0x00}}, /* Package strong reference batch */
 148     // Essence Container Data
 149     { 0x2701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x06,0x01,0x00,0x00,0x00}}, /* Linked Package UID */
 150     { 0x3F07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x04,0x00,0x00,0x00,0x00}}, /* BodySID */
 151     // Package
 152     { 0x4401, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x15,0x10,0x00,0x00,0x00,0x00}}, /* Package UID */
 153     { 0x4405, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x01,0x03,0x00,0x00}}, /* Package Creation Date */
 154     { 0x4404, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x10,0x02,0x05,0x00,0x00}}, /* Package Modified Date */
 155     { 0x4403, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x05,0x00,0x00}}, /* Tracks Strong reference array */
 156     { 0x4701, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x03,0x00,0x00}}, /* Descriptor */
 157     // Track
 158     { 0x4801, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x07,0x01,0x01,0x00,0x00,0x00,0x00}}, /* Track ID */
 159     { 0x4804, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x01,0x04,0x01,0x03,0x00,0x00,0x00,0x00}}, /* Track Number */
 160     { 0x4B01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x05,0x30,0x04,0x05,0x00,0x00,0x00,0x00}}, /* Edit Rate */
 161     { 0x4B02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x01,0x03,0x01,0x03,0x00,0x00}}, /* Origin */
 162     { 0x4803, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x02,0x04,0x00,0x00}}, /* Sequence reference */
 163     // Sequence
 164     { 0x0201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x07,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Data Definition UL */
 165     { 0x0202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x07,0x02,0x02,0x01,0x01,0x03,0x00,0x00}}, /* Duration */
 166     { 0x1001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x06,0x09,0x00,0x00}}, /* Structural Components reference array */
 167     // Source Clip
 168     { 0x1201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x04,0x00,0x00}}, /* Start position */
 169     { 0x1101, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x01,0x00,0x00,0x00}}, /* SourcePackageID */
 170     { 0x1102, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x03,0x02,0x00,0x00,0x00}}, /* SourceTrackID */
 171     // File Descriptor
 172     { 0x3F01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x04,0x06,0x0B,0x00,0x00}}, /* Sub Descriptors reference array */
 173     { 0x3006, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x06,0x01,0x01,0x03,0x05,0x00,0x00,0x00}}, /* Linked Track ID */
 174     { 0x3001, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x06,0x01,0x01,0x00,0x00,0x00,0x00}}, /* SampleRate */
 175     { 0x3004, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x06,0x01,0x01,0x04,0x01,0x02,0x00,0x00}}, /* Essence Container */
 176     // Generic Picture Essence Descriptor
 177     { 0x320C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Frame Layout */
 178     { 0x320D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x03,0x02,0x05,0x00,0x00,0x00}}, /* Video Line Map */
 179     { 0x3203, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x02,0x00,0x00,0x00}}, /* Stored Width */
 180     { 0x3202, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x05,0x02,0x01,0x00,0x00,0x00}}, /* Stored Height */
 181     { 0x320E, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x01,0x00,0x00,0x00}}, /* Aspect Ratio */
 182     { 0x3201, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x01,0x06,0x01,0x00,0x00,0x00,0x00}}, /* Picture Essence Coding */
 183     // Generic Sound Essence Descriptor
 184     { 0x3D02, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x04,0x00,0x00,0x00}}, /* Locked/Unlocked */
 185     { 0x3D03, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x03,0x01,0x01,0x01,0x00,0x00}}, /* Audio sampling rate */
 186     { 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
 187     { 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
 188     { 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
 189 };
 190
 191 static void mxf_write_uuid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 192 {
 193     put_buffer(pb, uuid_base, 12);
 194     put_be16(pb, type);
 195     put_be16(pb, value);
 196 }
 197
 198 static void mxf_write_umid(ByteIOContext *pb, enum MXFMetadataSetType type, int value)
 199 {
 200     put_buffer(pb, umid_base, 16);
 201     mxf_write_uuid(pb, type, value);
 202 }
 203
 204 static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
 205 {
 206     put_be32(pb, ref_count);
 207     put_be32(pb, 16);
 208 }
 209
 210 static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
 211 {
 212     // Determine the best BER size
 213     int size;
 214     if (len < 128) {
 215         //short form
 216         put_byte(pb, len);
 217         return 1;
 218     }
 219
 220     size = (av_log2(len) >> 3) + 1;
 221
 222     // long form
 223     put_byte(pb, 0x80 + size);
 224     while(size) {
 225         size --;
 226         put_byte(pb, len >> 8 * size & 0xff);
 227     }
 228     return 0;
 229 }
 230
 231 /*
 232  * Get essence container ul index
 233  */
 234 static int mxf_get_essence_container_ul_index(enum CodecID id)
 235 {
 236     int i;
 237     for (i = 0; i < FF_ARRAY_ELEMS(mxf_essence_container_uls); i++)
 238         if (mxf_essence_container_uls[i].id == id)
 239             return i;
 240     return -1;
 241 }
 242
 243 static void mxf_write_primer_pack(AVFormatContext *s)
 244 {
 245     ByteIOContext *pb = s->pb;
 246     int local_tag_number, i = 0;
 247
 248     local_tag_number = FF_ARRAY_ELEMS(mxf_local_tag_batch);
 249
 250     put_buffer(pb, primer_pack_key, 16);
 251     klv_encode_ber_length(pb, local_tag_number * 18 + 8);
 252
 253     put_be32(pb, local_tag_number); // local_tag num
 254     put_be32(pb, 18); // item size, always 18 according to the specs
 255
 256     for (i = 0; i < local_tag_number; i++) {
 257         put_be16(pb, mxf_local_tag_batch[i].local_tag);
 258         put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
 259     }
 260 }
 261
 262 static void mxf_write_local_tag(ByteIOContext *pb, int size, int tag)
 263 {
 264     put_be16(pb, tag);
 265     put_be16(pb, size);
 266 }
 267
 268 static void mxf_write_metadata_key(ByteIOContext *pb, unsigned int value)
 269 {
 270     put_buffer(pb, header_metadata_key, 13);
 271     put_be24(pb, value);
 272 }
 273
 274 static void mxf_free(AVFormatContext *s)
 275 {
 276     int i;
 277
 278     for (i = 0; i < s->nb_streams; i++) {
 279         AVStream *st = s->streams[i];
 280         av_freep(&st->priv_data);
 281     }
 282 }
 283
 284 static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
 285 {
 286     const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
 287     while (uls->type != CODEC_TYPE_DATA) {
 288         if (type == uls->type)
 289             break;
 290         uls++;
 291     }
 292     return uls;
 293 }
 294
 295 static void mxf_write_essence_container_refs(AVFormatContext *s)
 296 {
 297     MXFContext *c = s->priv_data;
 298     ByteIOContext *pb = s->pb;
 299     int i;
 300
 301     mxf_write_refs_count(pb, c->essence_container_count);
 302     av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
 303     for (i = 0; i < c->essence_container_count; i++) {
 304         put_buffer(pb, mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul, 16);
 305         PRINT_KEY(s, "essence container ul:\n", mxf_essence_container_uls[c->essence_containers_indices[i]].container_ul);
 306     }
 307 }
 308
 309 static void mxf_write_preface(AVFormatContext *s)
 310 {
 311     MXFContext *mxf = s->priv_data;
 312     ByteIOContext *pb = s->pb;
 313
 314     mxf_write_metadata_key(pb, 0x012f00);
 315     PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
 316     klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
 317
 318     // write preface set uid
 319     mxf_write_local_tag(pb, 16, 0x3C0A);
 320     mxf_write_uuid(pb, Preface, 0);
 321     PRINT_KEY(s, "preface uid", pb->buf_ptr - 16);
 322
 323     // write create date as unknown
 324     mxf_write_local_tag(pb, 8, 0x3B02);
 325     put_be64(pb, 0);
 326
 327     // write version
 328     mxf_write_local_tag(pb, 2, 0x3B05);
 329     put_be16(pb, 1);
 330
 331     // write identification_refs
 332     mxf_write_local_tag(pb, 16 + 8, 0x3B06);
 333     mxf_write_refs_count(pb, 1);
 334     mxf_write_uuid(pb, Identification, 0);
 335
 336     // write content_storage_refs
 337     mxf_write_local_tag(pb, 16, 0x3B03);
 338     mxf_write_uuid(pb, ContentStorage, 0);
 339
 340     mxf_write_local_tag(pb, 16, 0x3B09);
 341     put_buffer(pb, op1a_ul, 16);
 342
 343     // write essence_container_refs
 344     mxf_write_local_tag(pb, 8 + 16 * mxf->essence_container_count, 0x3B0A);
 345     mxf_write_essence_container_refs(s);
 346
 347     // write dm_scheme_refs
 348     mxf_write_local_tag(pb, 8, 0x3B0B);
 349     put_be64(pb, 0);
 350 }
 351
 352 /*
 353  * Write a local tag containing an ascii string as utf-16
 354  */
 355 static void mxf_write_local_tag_utf16(ByteIOContext *pb, int tag, const char *value)
 356 {
 357     int i, size = strlen(value);
 358     mxf_write_local_tag(pb, size*2, tag);
 359     for (i = 0; i < size; i++)
 360         put_be16(pb, value[i]);
 361 }
 362
 363 static void mxf_write_identification(AVFormatContext *s)
 364 {
 365     ByteIOContext *pb = s->pb;
 366     const char *company = "FFmpeg";
 367     const char *product = "OP1a Muxer";
 368     const char *version;
 369     int length;
 370
 371     mxf_write_metadata_key(pb, 0x013000);
 372     PRINT_KEY(s, "identification key", pb->buf_ptr - 16);
 373
 374     version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
 375         "0.0.0" : AV_STRINGIFY(LIBAVFORMAT_VERSION);
 376     length = 84 + (strlen(company)+strlen(product)+strlen(version))*2; // utf-16
 377     klv_encode_ber_length(pb, length);
 378
 379     // write uid
 380     mxf_write_local_tag(pb, 16, 0x3C0A);
 381     mxf_write_uuid(pb, Identification, 0);
 382     PRINT_KEY(s, "identification uid", pb->buf_ptr - 16);
 383
 384     // write generation uid
 385     mxf_write_local_tag(pb, 16, 0x3C09);
 386     mxf_write_uuid(pb, Identification, 1);
 387
 388     mxf_write_local_tag_utf16(pb, 0x3C01, company); // Company Name
 389     mxf_write_local_tag_utf16(pb, 0x3C02, product); // Product Name
 390     mxf_write_local_tag_utf16(pb, 0x3C04, version); // Version String
 391
 392     // write product uid
 393     mxf_write_local_tag(pb, 16, 0x3C05);
 394     mxf_write_uuid(pb, Identification, 2);
 395
 396     // write modified date
 397     mxf_write_local_tag(pb, 8, 0x3C06);
 398     put_be64(pb, 0);
 399 }
 400
 401 static void mxf_write_content_storage(AVFormatContext *s)
 402 {
 403     ByteIOContext *pb = s->pb;
 404
 405     mxf_write_metadata_key(pb, 0x011800);
 406     PRINT_KEY(s, "content storage key", pb->buf_ptr - 16);
 407     klv_encode_ber_length(pb, 92);
 408
 409     // write uid
 410     mxf_write_local_tag(pb, 16, 0x3C0A);
 411     mxf_write_uuid(pb, ContentStorage, 0);
 412     PRINT_KEY(s, "content storage uid", pb->buf_ptr - 16);
 413
 414     // write package reference
 415     mxf_write_local_tag(pb, 16 * 2 + 8, 0x1901);
 416     mxf_write_refs_count(pb, 2);
 417     mxf_write_uuid(pb, MaterialPackage, 0);
 418     mxf_write_uuid(pb, SourcePackage, 0);
 419
 420     // write essence container data
 421     mxf_write_local_tag(pb, 8 + 16, 0x1902);
 422     mxf_write_refs_count(pb, 1);
 423     mxf_write_uuid(pb, EssenceContainerData, 0);
 424 }
 425
 426 static void mxf_write_track(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 427 {
 428     ByteIOContext *pb = s->pb;
 429     MXFStreamContext *sc = st->priv_data;
 430
 431     mxf_write_metadata_key(pb, 0x013b00);
 432     PRINT_KEY(s, "track key", pb->buf_ptr - 16);
 433     klv_encode_ber_length(pb, 80);
 434
 435     // write track uid
 436     mxf_write_local_tag(pb, 16, 0x3C0A);
 437     mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, st->index);
 438     PRINT_KEY(s, "track uid", pb->buf_ptr - 16);
 439
 440     // write track id
 441     mxf_write_local_tag(pb, 4, 0x4801);
 442     put_be32(pb, st->index);
 443
 444     // write track number
 445     mxf_write_local_tag(pb, 4, 0x4804);
 446     if (type == MaterialPackage)
 447         put_be32(pb, 0); // track number of material package is 0
 448     else
 449         put_buffer(pb, sc->track_essence_element_key + 12, 4);
 450
 451     mxf_write_local_tag(pb, 8, 0x4B01);
 452     put_be32(pb, st->time_base.den);
 453     put_be32(pb, st->time_base.num);
 454
 455     // write origin
 456     mxf_write_local_tag(pb, 8, 0x4B02);
 457     put_be64(pb, 0);
 458
 459     // write sequence refs
 460     mxf_write_local_tag(pb, 16, 0x4803);
 461     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 462 }
 463
 464 static void mxf_write_common_fields(ByteIOContext *pb, AVStream *st)
 465 {
 466     const MXFDataDefinitionUL *data_def_ul = mxf_get_data_definition_ul(st->codec->codec_type);
 467     MXFStreamContext *sc = st->priv_data;
 468
 469     // find data define uls
 470     mxf_write_local_tag(pb, 16, 0x0201);
 471     put_buffer(pb, data_def_ul->uid, 16);
 472
 473     // write duration
 474     mxf_write_local_tag(pb, 8, 0x0202);
 475     put_be64(pb, sc->duration);
 476 }
 477
 478 static void mxf_write_sequence(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 479 {
 480     ByteIOContext *pb = s->pb;
 481
 482     mxf_write_metadata_key(pb, 0x010f00);
 483     PRINT_KEY(s, "sequence key", pb->buf_ptr - 16);
 484     klv_encode_ber_length(pb, 80);
 485
 486     mxf_write_local_tag(pb, 16, 0x3C0A);
 487     mxf_write_uuid(pb, type == MaterialPackage ? Sequence: Sequence + TypeBottom, st->index);
 488
 489     PRINT_KEY(s, "sequence uid", pb->buf_ptr - 16);
 490     mxf_write_common_fields(pb, st);
 491
 492     // write structural component
 493     mxf_write_local_tag(pb, 16 + 8, 0x1001);
 494     mxf_write_refs_count(pb, 1);
 495     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 496 }
 497
 498 static void mxf_write_structural_component(AVFormatContext *s, AVStream *st, enum MXFMetadataSetType type)
 499 {
 500     ByteIOContext *pb = s->pb;
 501     int i;
 502
 503     mxf_write_metadata_key(pb, 0x011100);
 504     PRINT_KEY(s, "sturctural component key", pb->buf_ptr - 16);
 505     klv_encode_ber_length(pb, 108);
 506
 507     // write uid
 508     mxf_write_local_tag(pb, 16, 0x3C0A);
 509     mxf_write_uuid(pb, type == MaterialPackage ? SourceClip: SourceClip + TypeBottom, st->index);
 510
 511     PRINT_KEY(s, "structural component uid", pb->buf_ptr - 16);
 512     mxf_write_common_fields(pb, st);
 513
 514     // write start_position
 515     mxf_write_local_tag(pb, 8, 0x1201);
 516     put_be64(pb, 0);
 517
 518     // write source package uid, end of the reference
 519     mxf_write_local_tag(pb, 32, 0x1101);
 520     if (type == SourcePackage) {
 521         for (i = 0; i < 4; i++)
 522             put_be64(pb, 0);
 523     } else
 524         mxf_write_umid(pb, SourcePackage, 0);
 525
 526     // write source track id
 527     mxf_write_local_tag(pb, 4, 0x1102);
 528     if (type == SourcePackage)
 529         put_be32(pb, 0);
 530     else
 531         put_be32(pb, st->index);
 532 }
 533
 534 static void mxf_write_multi_descriptor(AVFormatContext *s)
 535 {
 536     ByteIOContext *pb = s->pb;
 537     int i;
 538
 539     mxf_write_metadata_key(pb, 0x014400);
 540     PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
 541     klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
 542
 543     mxf_write_local_tag(pb, 16, 0x3C0A);
 544     mxf_write_uuid(pb, MultipleDescriptor, 0);
 545     PRINT_KEY(s, "multi_desc uid", pb->buf_ptr - 16);
 546
 547     // write sample rate
 548     mxf_write_local_tag(pb, 8, 0x3001);
 549     put_be32(pb, s->streams[0]->time_base.den);
 550     put_be32(pb, s->streams[0]->time_base.num);
 551
 552     // write essence container ul
 553     mxf_write_local_tag(pb, 16, 0x3004);
 554     put_buffer(pb, multiple_desc_ul, 16);
 555
 556     // write sub descriptor refs
 557     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x3F01);
 558     mxf_write_refs_count(pb, s->nb_streams);
 559     for (i = 0; i < s->nb_streams; i++)
 560         mxf_write_uuid(pb, SubDescriptor, i);
 561 }
 562
 563 static void mxf_write_generic_desc(ByteIOContext *pb, AVStream *st, const UID key, unsigned size)
 564 {
 565     MXFStreamContext *sc = st->priv_data;
 566
 567     put_buffer(pb, key, 16);
 568     klv_encode_ber_length(pb, size);
 569
 570     mxf_write_local_tag(pb, 16, 0x3C0A);
 571     mxf_write_uuid(pb, SubDescriptor, st->index);
 572
 573     mxf_write_local_tag(pb, 4, 0x3006);
 574     put_be32(pb, st->index);
 575
 576     mxf_write_local_tag(pb, 8, 0x3001);
 577     put_be32(pb, st->time_base.den);
 578     put_be32(pb, st->time_base.num);
 579
 580     mxf_write_local_tag(pb, 16, 0x3004);
 581     put_buffer(pb, mxf_essence_container_uls[sc->index].container_ul, 16);
 582 }
 583
 584 static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
 585 static const UID mxf_wav_descriptor_key       = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
 586 static const UID mxf_aes3_descriptor_key      = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 };
 587
 588 static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st)
 589 {
 590     MXFStreamContext *sc = st->priv_data;
 591     ByteIOContext *pb = s->pb;
 592     int stored_height = (st->codec->height+15)/16*16;
 593     AVRational dar;
 594     int f1, f2;
 595
 596     mxf_write_generic_desc(pb, st, mxf_mpegvideo_descriptor_key, 133);
 597
 598     mxf_write_local_tag(pb, 4, 0x3203);
 599     put_be32(pb, st->codec->width);
 600
 601     mxf_write_local_tag(pb, 4, 0x3202);
 602     put_be32(pb, stored_height>>sc->interlaced);
 603
 604     // frame layout
 605     mxf_write_local_tag(pb, 1, 0x320C);
 606     put_byte(pb, sc->interlaced);
 607
 608     // video line map
 609     mxf_write_local_tag(pb, 16, 0x320D);
 610     put_be32(pb, 2);
 611     put_be32(pb, 4);
 612     switch (st->codec->height) {
 613     case  576: f1 = 23; f2 = 336; break;
 614     case  608: f1 =  7; f2 = 320; break;
 615     case  480: f1 = 20; f2 = 283; break;
 616     case  512: f1 =  7; f2 = 270; break;
 617     case  720: f1 = 26; f2 =   0; break; // progressive
 618     case 1080: f1 = 21; f2 = 584; break;
 619     default:   f1 =  0; f2 =   0; break;
 620     }
 621
 622     if (!sc->interlaced) {
 623         f2  = 0;
 624         f1 *= 2;
 625     }
 626
 627     put_be32(pb, f1);
 628     put_be32(pb, f2);
 629
 630     av_reduce(&dar.num, &dar.den,
 631               st->codec->width*st->codec->sample_aspect_ratio.num,
 632               st->codec->height*st->codec->sample_aspect_ratio.den,
 633               1024*1024);
 634
 635     mxf_write_local_tag(pb, 8, 0x320E);
 636     put_be32(pb, dar.num);
 637     put_be32(pb, dar.den);
 638
 639     mxf_write_local_tag(pb, 16, 0x3201);
 640     put_buffer(pb, *sc->codec_ul, 16);
 641 }
 642
 643 static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size)
 644 {
 645     ByteIOContext *pb = s->pb;
 646
 647     mxf_write_generic_desc(pb, st, key, size);
 648
 649     // audio locked
 650     mxf_write_local_tag(pb, 1, 0x3D02);
 651     put_byte(pb, 1);
 652
 653     // write audio sampling rate
 654     mxf_write_local_tag(pb, 8, 0x3D03);
 655     put_be32(pb, st->codec->sample_rate);
 656     put_be32(pb, 1);
 657
 658     mxf_write_local_tag(pb, 4, 0x3D07);
 659     put_be32(pb, st->codec->channels);
 660
 661     mxf_write_local_tag(pb, 4, 0x3D01);
 662     put_be32(pb, st->codec->bits_per_coded_sample);
 663 }
 664
 665 static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st)
 666 {
 667     mxf_write_generic_sound_desc(s, st, mxf_wav_descriptor_key, 93);
 668 }
 669
 670 static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st)
 671 {
 672     mxf_write_generic_sound_desc(s, st, mxf_aes3_descriptor_key, 93);
 673 }
 674
 675 static void mxf_write_package(AVFormatContext *s, enum MXFMetadataSetType type)
 676 {
 677     ByteIOContext *pb = s->pb;
 678     int i;
 679
 680     if (type == MaterialPackage) {
 681         mxf_write_metadata_key(pb, 0x013600);
 682         PRINT_KEY(s, "Material Package key", pb->buf_ptr - 16);
 683         klv_encode_ber_length(pb, 92 + 16 * s->nb_streams);
 684     } else {
 685         mxf_write_metadata_key(pb, 0x013700);
 686         PRINT_KEY(s, "Source Package key", pb->buf_ptr - 16);
 687         klv_encode_ber_length(pb, 112 + 16 * s->nb_streams); // 20 bytes length for descriptor reference
 688     }
 689
 690     // write uid
 691     mxf_write_local_tag(pb, 16, 0x3C0A);
 692     mxf_write_uuid(pb, type, 0);
 693     av_log(s,AV_LOG_DEBUG, "package type:%d\n", type);
 694     PRINT_KEY(s, "package uid", pb->buf_ptr - 16);
 695
 696     // write package umid
 697     mxf_write_local_tag(pb, 32, 0x4401);
 698     mxf_write_umid(pb, type, 0);
 699     PRINT_KEY(s, "package umid second part", pb->buf_ptr - 16);
 700
 701     // write create date
 702     mxf_write_local_tag(pb, 8, 0x4405);
 703     put_be64(pb, 0);
 704
 705     // write modified date
 706     mxf_write_local_tag(pb, 8, 0x4404);
 707     put_be64(pb, 0);
 708
 709     // write track refs
 710     mxf_write_local_tag(pb, s->nb_streams * 16 + 8, 0x4403);
 711     mxf_write_refs_count(pb, s->nb_streams);
 712     for (i = 0; i < s->nb_streams; i++)
 713         mxf_write_uuid(pb, type == MaterialPackage ? Track : Track + TypeBottom, i);
 714
 715     // write multiple descriptor reference
 716     if (type == SourcePackage) {
 717         mxf_write_local_tag(pb, 16, 0x4701);
 718         if (s->nb_streams > 1) {
 719             mxf_write_uuid(pb, MultipleDescriptor, 0);
 720             mxf_write_multi_descriptor(s);
 721         } else
 722             mxf_write_uuid(pb, SubDescriptor, 0);
 723     }
 724
 725     for (i = 0; i < s->nb_streams; i++) {
 726         AVStream *st = s->streams[i];
 727         mxf_write_track(s, st, type);
 728         mxf_write_sequence(s, st, type);
 729         mxf_write_structural_component(s, st, type);
 730
 731         if (type == SourcePackage) {
 732             MXFStreamContext *sc = st->priv_data;
 733             mxf_essence_container_uls[sc->index].write_desc(s, st);
 734         }
 735     }
 736 }
 737
 738 static int mxf_write_essence_container_data(AVFormatContext *s)
 739 {
 740     ByteIOContext *pb = s->pb;
 741
 742     mxf_write_metadata_key(pb, 0x012300);
 743     klv_encode_ber_length(pb, 64);
 744
 745     mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
 746     mxf_write_uuid(pb, EssenceContainerData, 0);
 747
 748     mxf_write_local_tag(pb, 32, 0x2701); // Linked Package UID
 749     mxf_write_umid(pb, SourcePackage, 0);
 750
 751     mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
 752     put_be32(pb, 1);
 753
 754     return 0;
 755 }
 756
 757 static int mxf_write_header_metadata_sets(AVFormatContext *s)
 758 {
 759     mxf_write_preface(s);
 760     mxf_write_identification(s);
 761     mxf_write_content_storage(s);
 762     mxf_write_package(s, MaterialPackage);
 763     mxf_write_package(s, SourcePackage);
 764     mxf_write_essence_container_data(s);
 765     return 0;
 766 }
 767
 768 static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)
 769 {
 770     MXFContext *mxf = s->priv_data;
 771     ByteIOContext *pb = s->pb;
 772     int64_t header_byte_count_offset;
 773
 774     // write klv
 775     put_buffer(pb, key, 16);
 776
 777     klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
 778
 779     // write partition value
 780     put_be16(pb, 1); // majorVersion
 781     put_be16(pb, 2); // minorVersion
 782     put_be32(pb, 1); // kagSize
 783
 784     put_be64(pb, url_ftell(pb) - 25); // thisPartition
 785     put_be64(pb, 0); // previousPartition
 786
 787     put_be64(pb, mxf->footer_partition_offset); // footerPartition
 788
 789     // set offset
 790     header_byte_count_offset = url_ftell(pb);
 791     put_be64(pb, 0); // headerByteCount, update later
 792
 793     // no indexTable
 794     put_be64(pb, 0); // indexByteCount
 795     put_be32(pb, 0); // indexSID
 796     put_be64(pb, 0); // bodyOffset
 797
 798     put_be32(pb, bodysid); // bodySID
 799     put_buffer(pb, op1a_ul, 16); // operational pattern
 800
 801     // essence container
 802     mxf_write_essence_container_refs(s);
 803
 804     if (write_metadata) {
 805         // mark the start of the headermetadata and calculate metadata size
 806         int64_t pos, start = url_ftell(s->pb);
 807         mxf_write_primer_pack(s);
 808         mxf_write_header_metadata_sets(s);
 809         pos = url_ftell(s->pb);
 810         // update header_byte_count
 811         url_fseek(pb, header_byte_count_offset, SEEK_SET);
 812         put_be64(pb, pos - start);
 813         url_fseek(pb, pos, SEEK_SET);
 814     }
 815
 816     put_flush_packet(pb);
 817 }
 818
 819 static const UID mxf_mpeg2_codec_uls[] = {
 820     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x10,0x00 }, // MP-ML I-Frame
 821     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, // MP-ML Long GOP
 822     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, // 422P-ML I-Frame
 823     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, // 422P-ML Long GOP
 824     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x02,0x00 }, // MP-HL I-Frame
 825     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, // MP-HL Long GOP
 826     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, // 422P-HL I-Frame
 827     { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, // 422P-HL Long GOP
 828 };
 829
 830 static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
 831 {
 832     if (avctx->profile == 4) { // Main
 833         if (avctx->level == 8) // Main
 834             return avctx->gop_size ?
 835                 &mxf_mpeg2_codec_uls[1] :
 836                 &mxf_mpeg2_codec_uls[0];
 837         else if (avctx->level == 4) // High
 838             return avctx->gop_size ?
 839                 &mxf_mpeg2_codec_uls[5] :
 840                 &mxf_mpeg2_codec_uls[4];
 841     } else if (avctx->profile == 0) { // 422
 842         if (avctx->level == 5) // Main
 843             return avctx->gop_size ?
 844                 &mxf_mpeg2_codec_uls[3] :
 845                 &mxf_mpeg2_codec_uls[2];
 846         else if (avctx->level == 2) // High
 847             return avctx->gop_size ?
 848                 &mxf_mpeg2_codec_uls[7] :
 849                 &mxf_mpeg2_codec_uls[6];
 850     }
 851     return NULL;
 852 }
 853
 854 static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
 855 {
 856     MXFStreamContext *sc = st->priv_data;
 857     uint32_t c = -1;
 858     int i;
 859
 860     for(i = 0; i < pkt->size - 4; i++) {
 861         c = (c<<8) + pkt->data[i];
 862         if (c == 0x1B5) {
 863             if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
 864                 st->codec->profile = pkt->data[i+1] & 0x07;
 865                 st->codec->level   = pkt->data[i+2] >> 4;
 866             } else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
 867                 sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
 868                 break;
 869             }
 870         }
 871     }
 872     sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
 873     return !!sc->codec_ul;
 874 }
 875
 876 static int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame)
 877 {
 878     int i;
 879
 880     if (!samples_per_frame)
 881         return -1;
 882
 883     for (i = 0; i < s->nb_streams; i++) {
 884         AVStream *st = s->streams[i];
 885         AudioInterleaveContext *aic = st->priv_data;
 886
 887         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
 888             aic->sample_size = (st->codec->channels *
 889                                 av_get_bits_per_sample(st->codec->codec_id)) / 8;
 890             if (!aic->sample_size) {
 891                 av_log(s, AV_LOG_ERROR, "could not compute sample size\n");
 892                 return -1;
 893             }
 894             aic->samples_per_frame = samples_per_frame;
 895             aic->samples = aic->samples_per_frame;
 896
 897             av_fifo_init(&aic->fifo, 100 * *aic->samples);
 898         }
 899     }
 900
 901     return 0;
 902 }
 903
 904 static void ff_audio_interleave_close(AVFormatContext *s)
 905 {
 906     int i;
 907     for (i = 0; i < s->nb_streams; i++) {
 908         AVStream *st = s->streams[i];
 909         AudioInterleaveContext *aic = st->priv_data;
 910
 911         if (st->codec->codec_type == CODEC_TYPE_AUDIO)
 912             av_fifo_free(&aic->fifo);
 913     }
 914 }
 915
 916 static int mxf_write_header(AVFormatContext *s)
 917 {
 918     MXFContext *mxf = s->priv_data;
 919     int i;
 920     uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
 921     const int *samples_per_frame = NULL;
 922
 923     for (i = 0; i < s->nb_streams; i++) {
 924         AVStream *st = s->streams[i];
 925         MXFStreamContext *sc = av_mallocz(sizeof(*sc));
 926         if (!sc)
 927             return AVERROR(ENOMEM);
 928         st->priv_data = sc;
 929
 930         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
 931             if (!av_cmp_q(st->codec->time_base, (AVRational){ 1, 25 })) {
 932                 samples_per_frame = PAL_samples_per_frame;
 933                 mxf->time_base = (AVRational){ 1, 25 };
 934             } else if (!av_cmp_q(st->codec->time_base, (AVRational){ 1001, 30000 })) {
 935                 samples_per_frame = NTSC_samples_per_frame;
 936                 mxf->time_base = (AVRational){ 1001, 30000 };
 937             } else {
 938                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
 939                 return -1;
 940             }
 941         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
 942             if (st->codec->sample_rate != 48000) {
 943                 av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
 944                 return -1;
 945             }
 946         }
 947         sc->duration = -1;
 948
 949         sc->index = mxf_get_essence_container_ul_index(st->codec->codec_id);
 950         if (sc->index == -1) {
 951             av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
 952                    "codec not currently supported in container\n", i);
 953             return -1;
 954         }
 955
 956         sc->codec_ul = &mxf_essence_container_uls[sc->index].codec_ul;
 957
 958         if (!present[sc->index]) {
 959             mxf->essence_containers_indices[mxf->essence_container_count++] = sc->index;
 960             present[sc->index] = 1;
 961         } else
 962             present[sc->index]++;
 963         memcpy(sc->track_essence_element_key, mxf_essence_container_uls[sc->index].element_ul, 15);
 964         sc->track_essence_element_key[15] = present[sc->index];
 965         PRINT_KEY(s, "track essence element key", sc->track_essence_element_key);
 966     }
 967
 968     for (i = 0; i < s->nb_streams; i++) {
 969         MXFStreamContext *sc = s->streams[i]->priv_data;
 970         av_set_pts_info(s->streams[i], 64, mxf->time_base.num, mxf->time_base.den);
 971         // update element count
 972         sc->track_essence_element_key[13] = present[sc->index];
 973         sc->order = AV_RB32(sc->track_essence_element_key+12);
 974     }
 975
 976     if (!samples_per_frame)
 977         samples_per_frame = PAL_samples_per_frame;
 978
 979     if (ff_audio_interleave_init(s, samples_per_frame) < 0)
 980         return -1;
 981
 982     return 0;
 983 }
 984
 985 static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
 986 {
 987     MXFContext *mxf = s->priv_data;
 988     ByteIOContext *pb = s->pb;
 989     AVStream *st = s->streams[pkt->stream_index];
 990     MXFStreamContext *sc = st->priv_data;
 991
 992     if (!mxf->header_written) {
 993         if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
 994             if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
 995                 av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
 996                 return -1;
 997             }
 998         }
 999         mxf_write_partition(s, 1, header_open_partition_key, 1);
1000         mxf->header_written = 1;
1001     }
1002
1003     put_buffer(pb, sc->track_essence_element_key, 16); // write key
1004     klv_encode_ber_length(pb, pkt->size); // write length
1005     put_buffer(pb, pkt->data, pkt->size); // write value
1006
1007     sc->duration = FFMAX(pkt->pts + pkt->duration, sc->duration);
1008
1009     put_flush_packet(pb);
1010     return 0;
1011 }
1012
1013 static int mxf_write_footer(AVFormatContext *s)
1014 {
1015     MXFContext *mxf = s->priv_data;
1016     ByteIOContext *pb = s->pb;
1017
1018     mxf->footer_partition_offset = url_ftell(pb);
1019     mxf_write_partition(s, 0, footer_partition_key, 0);
1020     if (!url_is_streamed(s->pb)) {
1021         url_fseek(pb, 0, SEEK_SET);
1022         mxf_write_partition(s, 1, header_closed_partition_key, 1);
1023     }
1024
1025     ff_audio_interleave_close(s);
1026
1027     mxf_free(s);
1028     return 0;
1029 }
1030
1031 static int mxf_interleave_new_audio_packet(AVFormatContext *s, AVPacket *pkt,
1032                                            int stream_index, int flush)
1033 {
1034     AVStream *st = s->streams[stream_index];
1035     AudioInterleaveContext *aic = st->priv_data;
1036
1037     int size = FFMIN(av_fifo_size(&aic->fifo), *aic->samples * aic->sample_size);
1038     if (!size || (!flush && size == av_fifo_size(&aic->fifo)))
1039         return 0;
1040
1041     av_new_packet(pkt, size);
1042     av_fifo_read(&aic->fifo, pkt->data, size);
1043
1044     pkt->dts = pkt->pts = aic->dts;
1045     pkt->duration = av_rescale_q(*aic->samples,
1046                                  (AVRational){ 1, st->codec->sample_rate },
1047                                  st->time_base);
1048     pkt->stream_index = stream_index;
1049     aic->dts += pkt->duration;
1050
1051     aic->samples++;
1052     if (!*aic->samples)
1053         aic->samples = aic->samples_per_frame;
1054
1055     return size;
1056 }
1057
1058 static int mxf_interleave_get_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1059 {
1060     AVPacketList *pktl;
1061     int stream_count = 0;
1062     int streams[MAX_STREAMS];
1063
1064     memset(streams, 0, sizeof(streams));
1065     pktl = s->packet_buffer;
1066     while (pktl) {
1067         //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
1068         if (!streams[pktl->pkt.stream_index])
1069             stream_count++;
1070         streams[pktl->pkt.stream_index]++;
1071         pktl = pktl->next;
1072     }
1073
1074     if (stream_count && (s->nb_streams == stream_count || flush)) {
1075         pktl = s->packet_buffer;
1076         *out = pktl->pkt;
1077         //av_log(s, AV_LOG_DEBUG, "out st:%d dts:%lld\n", (*out).stream_index, (*out).dts);
1078         s->packet_buffer = pktl->next;
1079         av_freep(&pktl);
1080
1081         if (flush && stream_count < s->nb_streams) {
1082             // purge packet queue
1083             pktl = s->packet_buffer;
1084             while (pktl) {
1085                 AVPacketList *next = pktl->next;
1086                 av_free_packet(&pktl->pkt);
1087                 av_freep(&pktl);
1088                 pktl = next;
1089             }
1090             s->packet_buffer = NULL;
1091         }
1092
1093         return 1;
1094     } else {
1095         av_init_packet(out);
1096         return 0;
1097     }
1098 }
1099
1100 static int mxf_compare_timestamps(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
1101 {
1102     AVStream *st  = s->streams[pkt ->stream_index];
1103     AVStream *st2 = s->streams[next->stream_index];
1104     MXFStreamContext *sc  = st ->priv_data;
1105     MXFStreamContext *sc2 = st2->priv_data;
1106
1107     int64_t left  = st2->time_base.num * (int64_t)st ->time_base.den;
1108     int64_t right = st ->time_base.num * (int64_t)st2->time_base.den;
1109
1110     return next->dts * left > pkt->dts * right || // FIXME this can overflow
1111         (next->dts * left == pkt->dts * right && sc->order < sc2->order);
1112 }
1113
1114 static int mxf_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
1115 {
1116     int i;
1117
1118     if (pkt) {
1119         AVStream *st = s->streams[pkt->stream_index];
1120         AudioInterleaveContext *aic = st->priv_data;
1121         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1122             av_fifo_generic_write(&aic->fifo, pkt->data, pkt->size, NULL);
1123         } else {
1124             // rewrite pts and dts to be decoded time line position
1125             pkt->pts = pkt->dts = aic->dts;
1126             aic->dts += pkt->duration;
1127             ff_interleave_add_packet(s, pkt, mxf_compare_timestamps);
1128         }
1129         pkt = NULL;
1130     }
1131
1132     for (i = 0; i < s->nb_streams; i++) {
1133         AVStream *st = s->streams[i];
1134         if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
1135             AVPacket new_pkt;
1136             while (mxf_interleave_new_audio_packet(s, &new_pkt, i, flush))
1137                 ff_interleave_add_packet(s, &new_pkt, mxf_compare_timestamps);
1138         }
1139     }
1140
1141     return mxf_interleave_get_packet(s, out, pkt, flush);
1142 }
1143
1144 AVOutputFormat mxf_muxer = {
1145     "mxf",
1146     NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1147     NULL,
1148     "mxf",
1149     sizeof(MXFContext),
1150     CODEC_ID_PCM_S16LE,
1151     CODEC_ID_MPEG2VIDEO,
1152     mxf_write_header,
1153     mxf_write_packet,
1154     mxf_write_footer,
1155     0,
1156     NULL,
1157     mxf_interleave,
1158 };